Flushing the cooling system?

Pat Blank wrote in news:Xns951CE800C93Fuseemailinsig@206.141.193.32:

Here's a link to a picture of the valve.

Interesting. A heater core bypass valve. Haven't seen those in a looooong time. All it does is bypass the flow to your heater core when the heat isn't on.

It would keep the flush from going throug your heater core unless you had the heat turned on. If all your after is the radiator and block it won't bother anything. IF you want to flush the heater core too, just turn the heat on.

That valve defaults in the open position with no vacuum applied in my

2. Don't forget the block drain, it is under the exhaust near the rear of the block.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Pat Blank wrote:

"DougW" wrote in news:wmUFc.35623$Lh.19214@okepread01:

Thanks Doug. I want to flush everything.

Mike Romain wrote in news: snipped-for-privacy@sympatico.ca:

Do I have to open that drain even with using the backflush kit?

If you only want to clean the rads out, then no. If you want to clean the whole works out, then yes.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

"DougW" wrote in news:wmUFc.35623$Lh.19214@okepread01:

Alright. While attempting to get the top heater hose off the valve, the hose fitting snapped like a twig. So I had to remove the valve and run both heater hoses to the firewall. Will this be a problem? I also plugged the vacuum line going to the valve, is that the proper thing to do?

Please forgive me for being a PITA. :/

Pat Blank did pass the time by typing:

Nope. Not near as much as having that snap while you were on the road.

Yep. Otherwise you will have a vac leak and that can cause all sort of wonky things.

Ok. :)

..seriously.. It's failure to ask questions that is bad. :)

"DougW" wrote in news:XA0Gc.35967$Lh.24861@okepread01:

Might I also assume that the inside of the Jeep will get a bit warm without the valve in there? If that is the case I'm thinking of just looping the hose from the thermostat around to the water pump until I can replace the valve. What do you think of that idea?

Thanks.

Pat Blank did pass the time by typing:

It could get a bit warm.

One of my coworkers build a similar system out of two brass valves for his old pickup.

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Can't you get a ticket for flushing radiator coolant into the street now?

-Bill (remove "botizer" to reply via email)

Too bad you missed my post about the valve defaulting 'open' with no vacuum...

Those valves are brittle. A friend snapped his while changing plugs.

I used a deep 1/2 socket to put the two hose ends together to get him by until he got a new valve.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Mike Romain wrote in news: snipped-for-privacy@sympatico.ca:

I read your post Mike, but I had to change my heater hoses, so there was no way to get around messing with the valve. I wish I would have just cut the damn hoses off. Live and learn and learn and learn...

The one I saw was basically rotten, it just crumbled.

Mike

Been there, broke that. $15 for XJ at Advanced Auto. Plastic.

"flannery" wrote in news:g1BGc.18150$JR4.14500@attbi_s54:

Well, looks like the price has gone up to $23 according to the website. I'll give them a call to see if there is a difference.

Regards.